The document proposes a new augmented reality navigation application called RoadAR. It would use smartphone sensors and video recording to refine GPS data and automatically map roads, signs, and other objects in real-time. Users could share routes and traffic information via radio communication. The application aims to provide more accurate navigation, automatic map updates, and monetize traffic and location data for advertising. It has the potential to become a large market by addressing limitations of existing navigation systems and building a social community of drivers.